Hex key drive flat head screws to be countersunk into surfaces. SAE flat heads require 82 degree countersinks.
Hex Drive Flat Head Screws
Flat head screws sit flush with the surface when driven into a countersunk hole, which makes them a clean choice for mounting hardware, hatches, and fittings on a model. The screws in this category use a hex drive, so they are turned with an Allen wrench rather than a screwdriver.
Sizes and Lengths
The selection includes 2-56 screws in lengths from 1/2 inch through 7/8 inch, along with 4-40 sizes in lengths such as 7/16 and 9/16 inch. Each size is listed in a quantity of six, which covers a typical mounting job with a few spares. The hex drive is worth noting on small screws, since a hex socket is less prone to slipping and stripping than a slotted or Phillips head at these sizes.
Matching the thread and length to your application keeps the head seated properly and the joint secure, and a countersink that matches the head angle lets the screw finish flush rather than proud of the surface.
Browse the size listings above to find the screw you need.
 "Flat Head Hex Drive Screw, 2-56 x 1/2\" Qty 6")
 "Flat Head Hex Drive Screw, 2-56 x 5/8\" Qty 6")
 "Flat Head Hex Drive Screw, 2-56 x 3/4\" Qty 6")
 "Flat Head Hex Drive Screw, 2-56 x 7/8\" Qty 6")
 "Flat Head Hex Drive Screw, 4-40 x 7/16\" Qty 6")
 "Flat Head Hex Drive Screw, 4-40 x 9/16\" Qty 6")
 "Flat Head Hex Drive Screw, 4-40 x 5/8\" Qty 6")
 "Flat Head Hex Drive Screw, 4-40 x 3/4\" Qty 6")
 "Flat Head Hex Drive Screw, 4-40 x 7/8\" Qty 6")
 "Flat Head Hex Drive Screw, 6-32 x 7/16\" Qty 6")
 "Flat Head Hex Drive Screw, 6-32 x 1/2\" Qty 6")
 "Flat Head Hex Drive Screw, 6-32 x 9/16\" Qty 6")
 "Flat Head Hex Drive Screw, 6-32 x 5/8\" Qty 6")
 "Flat Head Hex Drive Screw, 6-32 x 3/4\" Qty 6")
 "Flat Head Hex Drive Screw, 6-32 x 7/8\" Qty 6")
